ADDENDA. 499 



A large and Helotium-like species, having acerose para- 

 physes, which have never been observed before in a perfectly 

 o-labrous species, the presence of which fully justifies placing 

 here. The asci are 500 ll long, and 4 ll broad ; the para- 

 physes are 70 fx long. (Phil.) ^ 



There appears to be some mistake in the measurements of 

 the asci and paraphyses as given above, as the paraphyses 

 are described as being longer than the asci; probably the 

 asci are 50 \x instead of 500 as stated. 



Unknown to me. 



(To follow H. lacteum, p. 269.) 



Sclerotinia baccarum. Renin, Hedw., 1885, n. i. 

 p. 9 ; Sacc, Syll., viii. n. 813 ; Rehm, Krypt.-Flora., Disc. 

 p. 806; Woronin, Mem. Acad. Imp. St.-Petersb., p. 31, ph 

 viii. (1888). 



Sclerotium formed within the fruit of Vaccinium myrtillus, 

 and producing 1-3 stipitate ascophores which are closed 

 when young, then hemispherical, finally expanded, brown, 

 glabrous, rather thin, J— 1 cm. across, stem variable in 

 length, 2-4 cm. long, cylindrical, slender, often flexuous, 

 brown, glabrous, or minutely velvety at the base; hypo- 

 thecium brown, formed of interwoven hyphae ; asci cylin- 

 drical, apex slightly truncate, narrowed below into a slender, 

 usually crooked pedicel, 8-spored ; spores 1-seriate, hyaline, 

 continuous, smooth, elliptical, ends rounded, 16-20 X 8-9 ll ; 

 as a rule only four of the spores in an ascus become fully 

 developed, the other four remaining quite small; paraphyses 

 slender, septate, hyaline, apex slightly clavate. 



The conidial form attacks the young, living shoots of the 

 host-plant, appearing as a Monilia-WkQ, white bloom formed 

 of simple or branched chains of subglobose, hyaline conidia 

 about 3 ll diameter. 



The ascophores appear on the fallen fruit of Vaccinum 

 myrtillus, which contain sclerotia in their interior. Infected 

 fruits are readily recognised before they fall from the plant 

 by their whitish colour and somewhat shrivelled appear- 

 ance. 



Dr. Trail, F.E.S., of Aberdeen, has collected berries con- 

 taining sclerotia, but mature ascophores are not yet recorded. 



(To follow S. bulborum, p. 284.) 



2 k 2 



